{
  "manageEntity": {
    "action": "Save",
    "entityId": "108854",
    "entityType": "Track",
    "nonce": "0x6d541c0e984a57b583ac49440d2f92f58a542a6615cd5442f7802fbbb7feb202",
    "signature": "0x8fbd00159bd946b82024f94a047fedb5126b1765eb2dd4b843badba484607d5179fa97db2a3d488ed815c9141e863df3444a8a69d57ae02b2a146b13fc80e3f81b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}